Permissions

c Copyright 2011 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC S108, as revised by P.L. 94-553) does not require the AMS's permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or copyrights@ametsoc.org.

Conditions of Use

Author can archive pre-print (i.e., pre-refereeing)

Author can archive post-print (i.e., final draft post-refereeing)

On author's personal website or e-prints server

Author's Post-print (accepted version) must be removed no later than 1months after publication and replaced with abstract of article, along with full citation

Publisher's version/PDF may be used (not EOR version) on Institutional Repository only

Publisher's version/PDF may be used on an Institutional Repository after 6months embargo

Institutional affiliation must be listed in article

Publisher copyright must be acknowledged with set statement (see policy)

Set statement to accompany each version deposited, e.g. for pre-print, authors post-print etc